#include <iostream>
#include <cstring>

using namespace std;

const int N = 110, M = 4510;

int f[N][N];
int n, m;

int main()
{
	cin >> n >> m;
	memset(f, 0x3f, sizeof f);
	for(int i = 1; i <= n; i++) f[i][i] = 0;
	for(int i = 1; i <= m; i++)
	{
		int a, b, c; cin >> a >> b >> c;
		f[a][b] = f[b][a] = min(f[a][b]);
	}
	
	for(int k = 1; k <= n; k++)
	{
		for(int i = 1; i <= n; i++)
		{
			for(int j = 1; j <= n; j++)
			{
				f[i][j] = min(f[i][j], f[i][k] + f[k][j]);
			}
		}
	}
	for(int i = 1; i <= n; i++)
	{
		for(int j = 1; j <= n; j++)
		{
			cout << f[i][j] << " ";
		}
		cout << endl;
	}
	return 0;
 } 
